Filtering-funnel



UNITED STATES PATENT OFFICE.

HENRY BELL, OF BALTIMORE, MARYLAND.

FlLTERlNG-FUNNEL.

SPECIFICATION forming part of Letters Patent No. 267,133, dated November7, 1882.

Application tiled March 14, 1882. (No model.)

,To all whom it may concern Be it known that I, HENRY BELL, of the cityof Baltimore, in the State of Maryland, have invented a new and usefulImprovement in Filtering-Funnels, of which the following is a full,clear, and exact description, reference being had to the annexeddrawings, forining part of this speciiication.

This invention relates to tiltering-funnels which are provided withvent-tubes; andthe invention consists in the novel construction ot thefunnel and combination therewith of the tube, as hereinafter described.

1n the accompanying drawings, igure l is a vertical section of thefunnel, and Fig. 2 is a top or plan view with the ltering-paper partlybroken away.

The funnel A, which is preferably made of glass, porcelain, or similarmaterial, is constructed with an annular projection, a, around the brim,and grooves b on each side of the projection, into which grooves tit theedges of va rubber band, c, extending around and cov- I ering theprojection a.

With this construction brittle material which is comparativelyinexpensive maybe successfully used in the manufacture of funnels, sincethe rubber band is adapted to break the force ot' ordinary accidentalknocks, andwiil thus prevent the chipping or cracking ot' the funnel.

To prevent the filtering-paper d from being pressed down close to theinner surface ot' the bowl e by the weight of the liquid, and thusobstructing the proper iow of the latter, l construct the said innersurface with segmental projectionsf, made lsloping from the top to theends, and arranged in concentric rows in such manner that th projectionso f one row shall cover the openiigs between the projections of the nextlow r row, sufficient space being left-at the ends ,bf the projectionsto allow the liquid to pass down freely from one row to another. The?,ltering-paper is thus supported above the inner surface of the bowl, anda passagenisgforniyed between the paper washer, m, is placed over theouter end of the n tube, and a nut, n, is screwed on said end to securethe tube in place and form a watertight joint.

It is evident that the use of a rubber band around the brim of thefunnel would suggest the application of such a band to other vesselshaving a brim, which' are made of brittle material, and I therefore donot wish to limit myselffrtgtwhe use above described.

Having thus described my invention, what I claim as new, and desire tovsecure by Letters Patent, is-

l. A funnel made of brittle material, having an annular projectionaround the brim, and agroove on each side of the projection, incombination with an elastic band, substantially as shown and described.

2. A funnel having the inner surface of its bowl provided with segmentalprojections, made sloping from the top to the ends, and arranged inconcentric rows in such manner that the projections of one row shallcover the spaces between those of the next lower row, as and for thepurpose described.

3. A funnel having an orifice through one side of the bowl, incombination with a venttube secured in the orifice by means of rubberwashers and a nut, substantially as shown and described.

HENRY BELL.

Witnesses Jos. KAUSTER, M. S. BARBER.

